Unit CastleFrustum
Description
Frustum object (TFrustum) and helpers.
Uses
Overview
Classes, Interfaces, Objects and Records
| Name | Description |
|---|---|
Record TFrustum |
Viewing frustum, defined as 6 plane equations. |
Types
TFrustumPlane = (...); |
TFrustumPoints = packed array [0..7] of packed record
case Integer of
0: (XYZ: TVector3; W: Single);
1: (XYZW: TVector4);
end; |
TFrustumPointsSingle = TFrustumPoints deprecated 'use TFrustumPoints'; |
TFrustumPointsDouble = packed array [0..7] of packed record
case Integer of
0: (XYZ: TVector3Double; W: Double);
1: (XYZW: TVector4Double);
end deprecated 'use Single-precision TFrustumPoints'; |
TFrustumCollisionPossible = (...); |
PFrustum = ˆTFrustum; |
Constants
FrustumPointsQuadsIndexes: array[TFrustumPlane, 0..3]of LongWord =
( (0, 3, 7, 4),
(1, 2, 6, 5),
(2, 3, 7, 6),
(0, 1, 5, 4),
(0, 1, 2, 3),
(4, 5, 6, 7) ); |
FrustumPointsLinesIndexes: array[0..11, 0..1]of LongWord =
( (0, 1), (1, 2), (2, 3), (3, 0),
(4, 5), (5, 6), (6, 7), (7, 4),
(0, 4), (1, 5), (2, 6), (3, 7)
); |
Description
Types
TFrustumPlane = (...); |
|
Order of planes of TFrustum. (This order is the same as the order of params to procedure FrustumProjectionMatrix and OpenGL's glFrustum routine. Article [http://www2.ravensoft.com/users/ggribb/plane%20extraction.pdf] has swapped bottom and top positions). Values
|
TFrustumPoints = packed array [0..7] of packed record
case Integer of
0: (XYZ: TVector3; W: Single);
1: (XYZW: TVector4);
end; |
TFrustumPointsSingle = TFrustumPoints deprecated 'use TFrustumPoints'; |
|
Warning: this symbol is deprecated: use TFrustumPoints |
TFrustumPointsDouble = packed array [0..7] of packed record
case Integer of
0: (XYZ: TVector3Double; W: Double);
1: (XYZW: TVector4Double);
end deprecated 'use Single-precision TFrustumPoints'; |
|
Warning: this symbol is deprecated: use Single-precision TFrustumPoints |
TFrustumCollisionPossible = (...); |
|
See TFrustum.SphereCollisionPossible for description what each value of this type means. Values
|
PFrustum = ˆTFrustum; |
Constants
FrustumPointsQuadsIndexes: array[TFrustumPlane, 0..3]of LongWord =
( (0, 3, 7, 4),
(1, 2, 6, 5),
(2, 3, 7, 6),
(0, 1, 5, 4),
(0, 1, 2, 3),
(4, 5, 6, 7) ); |
FrustumPointsLinesIndexes: array[0..11, 0..1]of LongWord =
( (0, 1), (1, 2), (2, 3), (3, 0),
(4, 5), (5, 6), (6, 7), (7, 4),
(0, 4), (1, 5), (2, 6), (3, 7)
); |
|
Useful if you want to draw frustum obtained from TFrustum.CalculatePoints. It's guaranteed that the first 4 items touch only the first 4 (near plane) points of the frustum — useful if you want to draw only the near plane rect. For ZFarInfinity, other points may be in infinity. |
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